// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_RESIZE_AREA_H_
#define UI_VIEWS_CONTROLS_RESIZE_AREA_H_

#include <string>

#include "base/macros.h"
#include "ui/views/view.h"

namespace views {

class ResizeAreaDelegate;

////////////////////////////////////////////////////////////////////////////////
//
// An invisible area that acts like a horizontal resizer.
//
////////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT ResizeArea : public View {
public:
    static const char kViewClassName[];

    explicit ResizeArea(ResizeAreaDelegate* delegate);
    ~ResizeArea() override;

    // Overridden from views::View:
    const char* GetClassName() const override;
    gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
    bool OnMousePressed(const ui::MouseEvent& event) override;
    bool OnMouseDragged(const ui::MouseEvent& event) override;
    void OnMouseReleased(const ui::MouseEvent& event) override;
    void OnMouseCaptureLost() override;
    void GetAccessibleState(ui::AXViewState* state) override;

private:
    // Report the amount the user resized by to the delegate, accounting for
    // directionality.
    void ReportResizeAmount(int resize_amount, bool last_update);

    // The delegate to notify when we have updates.
    ResizeAreaDelegate* delegate_;

    // The mouse position at start (in screen coordinates).
    int initial_position_;

    DISALLOW_COPY_AND_ASSIGN(ResizeArea);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_RESIZE_AREA_H_
